The command line option -r is used to set the maximum number of events that slic will run.
| No Format |
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slic -g mygeom.lcdd -i events.stdhep -r 1 |
The actual number of events may be less, if you have a file-based event source like a StdHep file that has fewer events than the specified maximum.
The Geant4 built-in command /run/beamOn is the corresponding command.
| No Format |
|---|
/run/beamOn 1 |